/* * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. This file is distributed * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. See the License for the specific language governing * permissions and limitations under the License. */ package software.amazon.awssdk.testutils.retry; import java.util.concurrent.TimeUnit; import org.junit.rules.TestRule; import org.junit.runner.Description; import org.junit.runners.model.Statement; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import software.amazon.awssdk.utils.Validate; public class RetryRule implements TestRule { private static final Logger log = LoggerFactory.getLogger(RetryRule.class); private int maxRetryAttempts; private long delay; private TimeUnit timeUnit; public RetryRule(int maxRetryAttempts) { this(maxRetryAttempts, 0, TimeUnit.SECONDS); } public RetryRule(int maxRetryAttempts, long delay, TimeUnit timeUnit) { this.maxRetryAttempts = maxRetryAttempts; this.delay = delay; this.timeUnit = Validate.paramNotNull(timeUnit, "timeUnit"); } @Override public Statement apply(final Statement base, Description description) { return new Statement() { @Override public void evaluate() throws Throwable { retry(base, 1); } void retry(final Statement base, int attempts) throws Throwable { try { base.evaluate(); } catch (Exception e) { if (attempts > maxRetryAttempts) { throw e; } log.warn("Test failed. Retrying with delay of: {} {}", delay, timeUnit); timeUnit.sleep(delay); retry(base, ++attempts); } } }; } }